Eibach do a 50mm kit.
Eibach Sportline
Polo (6N I) 1.0, 1.3, 1.4, 1.6, 1.6 GTI, 1.7 SDI, 1.9 D, 1.9 SDI 10.94 - 10.99 20-85-004-01-22 £115.06
Polo (6N II) 1.0, 1.4, 1.6 Schaltgetrriebe 10.99 - 11.01 20-85-004-02-22 £115.06
http://www.awesome-gti.co.uk/vw%20polom ... nsion.html
Not too sure how that works above though 1.6 GTI is on 6N I instead of 6N II?